Tf<sub>2</sub>O-Promoted Intramolecular Schmidt Reaction of the ω-Azido Carboxylic Acids
作者:Xue-Juan Wang、Yan Su、Rui Li、Peiming Gu
DOI:10.1021/acs.joc.8b00475
日期:2018.5.18
A designed Tf2O-promoted intramolecular Schmidt reaction of 2-substituted ω-azido carboxylic acids was demonstrated. Tf2O was used as an activation reagent for the carboxylic acid, and ω-azido anhydride was in situ generated, releasing a molecular TfOH, which acted as an acid promoter for the Schmidt process. A series of 2-substituted pyrrolidines was produced and acetylated for better purification
证明了设计的Tf 2 O促进的2-取代的ω-叠氮基羧酸分子内Schmidt反应。将Tf 2 O用作羧酸的活化剂,并原位生成ω-叠氮酸酐,释放出分子TfOH,该分子充当Schmidt工艺的酸促进剂。产生了一系列2-取代的吡咯烷并进行了乙酰化,以实现更好的纯化。该策略对于将4-取代的ω-叠氮基羧酸转化为三环内酰胺也是有效的。